If I build industrial robotics behavior software where the constomers are other businesses and government organizations who may pay a one time up-front cost and then an annual sustainment license, can your AI personas actually accurately predict pricing in that domain (which is notoriously difficult) or is this just for consumer applications like meditation apps and the like?
Readit Newsmojomark commented on We're Making Enterprise Pricing Research Cost Less Than Your Domain Name askrally.com/article/ente... · Posted by u/virtual_rf
mojomark commented on Ask HN: Where are the AI-driven profits or promotions? · Posted by u/arduinomancer
Where are the e-mail-driven profits?
I use ChatGPT every day, to make myself more efficient (I get things done more quickly and with higher quality). Nobody really knows I use it.
> Seems like you should give the advantage to the people who are behind, not ahead...
Lol? How did you work that one out?
By extension, should the olympics be comprised entirely of each country's worst athletes?
The original comment is likely accurate regarding the benefit to ditectly trailing swimmers, but probably not trailing swimmers where shed vortices are stable in adjacent lanes where shed vortices interact chaotically.
mojomark commented on Stone–Wales Transformations johncarlosbaez.wordpress.... · Posted by u/chmaynard
for the second transformation the molecule loses aromaticity, so if it was conductive there would be a local conductivity defect. aromatic hexagons are flat and pentagons and heptagons are not, so there would likely be a "desired" curvature difference.
in the specific case of graphene, a heptagon/pentagon stone wales transformation would almost certainly snap back to all hexagons due to the strain.
Are you suggesting something like this could be used in an electroactive material that exhibits physical deformation to behave like an artificial muscle? (not suggesting that would be practical or efficient, but maybe?)
Any turbulence created by waves and vortices smashing into hard surfaces is going to slow the swimmer down. To paraphrase an old adage, smooth is fast.
I'm inclined to concur with onlypassingthrough. If the resulting wake is similar to fish locomotion (e.g. thunniform or similar) vortices will shed off in a Karmen Vortex Street that spreads laterally with distance behind the swimmer (potentially into other lanes, and propulsive efficiency of propulsors are generally less efficient in turbulant vice laminar open-water flow... but not always, it can depend on the 'structure' [how chaotic] the flow is).
The magnitude of the energy in that turbulent wake will depend on how efficiently the oscillating fin interacts with water over time to produce forward thrust. The cool thing about oscillating foils as opposed to rotating thrusters, is that when the fin 'swoops' once it creates Vortex 'A' spinning clockwise, and when it 'swoops' back the result would be a Vortex 'B' spinning counterclockwise, and the two vortices will partially cancel out. That cancellation serves to recover energy from Vortex 'A' and the energy is transferred back into forward thrust.
In other words, fish tails create trails of contrarotating vortices and continually push off of them. It's like walking up a springy staircase, where each step you make, a little energy is recovered to bounce you up to the next step.
In theory, if you had a swimmer in front of you, generating a Karmen Vortex Street and not effectively canceling out those vortices, but instead just shedding vortices, you can use the energy from the swimmer in front of you to 'spring' yourself forward - barely using any energy yourself. Those complex hyrdodynamic relationships could be why some swimmers/flyers tend to fly in specific formations with other animals in their school/flock.
Bottom line, I would bet that any residual vortices that spread into adjacent swimming lanes will tend to interact chaotically and result in unstructured turbulance, which should yield less optimal swimming conditions for swimmers in those lanes.
mojomark commented on Stone–Wales Transformations johncarlosbaez.wordpress.... · Posted by u/chmaynard
This is cool, but I wonder what the implications are for the mutated molecule's characteristics that might result in microscopic material properties/behaviors.
mojomark commented on Robotic tongue drummer bangs out all the ambient hits blog.arduino.cc/2025/06/0... · Posted by u/PaulHoule
Oh snap- this is awesome, well done! As I was going through this post I was thinking how awesome it would be to have a little robot trap set (snare, base drum, tom-toms, symbols, etc.) drummer that plays along to my pop music while sitting on my desk to give me a little show whenever I need to smile. Or maybe a little bongo player.
Super fun!
mojomark commented on I ditched my laptop for a pocketable mini PC and a pair of AR glasses tomsguide.com/computing/i... · Posted by u/T-A
What’s the resolution? Can you see the small text of individual items of the Word ribbon?
I don't know the answer to your question specifically, but in general, if someone tells you the resolution in terms of 'X by Y' pixels, that is unuseful information for an AR display. It drives me bananas that this isn't industry standard after all these years.
Instead, you need resolution in terms of Pixels Per Degree (PPD). And, to have any hope of viewing legible text on a virtual monitor projected via an AR HUD, like you can on a physical laptop monitor, you need at least 35PPD.
> end-to-end messages
As opposed to what? I think they accidentally a word.
The actual article title uses the phrase "end-to-end encryption". The HN OP just missed the word.
I'm still honestly looking for an answer to my question below. The only thing this seems to do (to me) is add another minor step for a Hacker to read your email. Adding another authentication factor seems much more secure than this half-baked E2EE approach.
I don't get it.
Isn't the goal to prevent someone from hacking into your email account and reading your email? If someone already hacked I to Alice's email account, and pretends to be her to access the decryption key (which they can do because they can prove they have control of the account - which is all key access requires), then they can decrypt the message.
Seems pretty pointless, unless I'm missing a key point (perfectly possible)